seats MERCEDES-BENZ B-CLASS 2012 Owner's Manual

Switching the seat heating on/off
Activating/deactivating G
WARNING
Repeatedly switching on the seat heating can
cause the seat cushion and backrest pads to
become very hot. The health of persons with
limited temperature sensitivity or a limited
ability to react to excessively high
temperatures may be affected or they may
even suffer burn-like injuries. There is a risk
of injury.
Therefore, do not switch the seat heating on
repeatedly. The three red indicator lamps in the button
indicate the heating level you have selected.
The system automatically switches down
from level 3 to level 2 after approximately
eight minutes.
The system automatically switches down
from level
2
to level 1 after approximately ten
minutes.
The system automatically switches off
approximately 20 minutes after it is set to
level 1.
X Make sure that the SmartKey is in position
1 or 2 in the ignition lock.
X To switch on: press button : repeatedly
until the desired heating level is set.
X To switch off: press button : repeatedly
until all the indicator lamps go out.
i If the battery voltage is too low, the seat
heating may switch off. Problems with the seat heating The seat heating has switched off
prematurely or cannot be switched on. The
vehicle's electrical system voltage is too low
because too many electrical consumers are
switched on.
X
Switch off electrical consumers that you do
not need, such as the rear window
defroster or interior lighting. Steering wheel
Important safety notes
G
WARNING
You could lose control of your vehicle if you
do the following while driving:
R adjust the driver's seat, head restraint,
steering wheel or mirrors
R fasten the seat belt
There is a risk of an accident.
Adjust the driver's seat, head restraint,
steering wheel and mirror and fasten your
seat belt before starting the engine. G
WARNING
Children could injure themselves if they
adjust the steering wheel. There is a risk of
injury.
When leaving the vehicle, always take the
SmartKey with you

and lock the vehicle. Never
leave children unsupervised in the vehicle. Adjusting the steering wheel
G
WARNING
If the steering wheel is unlocked while the
vehicle is in motion, it could change position
unexpectedly. This could cause you to lose
control of the vehicle. There is a risk of an
accident.
Before starting off, make sure the steering
wheel is locked. Never unlock the steering
wheel while the vehicle is in motion. Steering wheel
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Seats, steering wheel and mirrors Z
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:
Release lever
; To adjust the steering wheel height
= To adjust the steering wheel position
(fore-and-aft adjustment)
X Push release lever : down completely.
The steering column is unlocked.
X Adjust the steering wheel to the desired
position.
X Push release lever : up completely.
The steering column is locked.
X Check if the steering column is locked.
When doing so, try to push the steering
wheel up or down or try to move it in the
fore-and-aft direction. Mirrors
Rear-view mirror
X
Anti-glare mode: flick anti-glare lever :
forwards or back. Exterior mirrors
Adjusting the exterior mirrors G
WARNING
The exterior mirror on the front-passenger
side reduces the size of the image. Visible
objects are actually closer than they appear.
This means that you could misjudge the
distance from road users traveling behind,
e.g. when changing
lane. There is a risk of an
accident.
For this reason, always make sure of the
actual distance from the road users traveling
behind by glancing over your shoulder. X
Make sure that the SmartKey is in position
1 or 2 in the ignition lock.
X Press button : for the left-hand exterior
mirror or button ; for the right-hand
exterior mirror.
The indicator lamp in the corresponding
button lights up in red.
The indicator lamp goes out again after
some time. You can adjust the selected
mirror using adjustment button = as long
as the indicator lamp is lit.
X Press adjustment button = up, down, or
to the left or right until you have adjusted
the exterior mirror to the correct position.
You should have a good overview of traffic
conditions.
The convex exterior mirrors provide a larger
field of vision.
The exterior
mirrors

are automatically heated
after starting the vehicle if the rear window 92
Mirrors
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defroster is switched on and the outside
temperature is
low.
Mirror heating lasts up to
10 minutes.
i You can also heat up the exterior mirrors
manually by switching on the rear window
defroster.
Folding the exterior mirrors in or out
electrically X
Make sure that the SmartKey is in position
1 or 2 in the ignition lock.
X Briefly press button :.
Both exterior mirrors fold in or out.
i Make sure that the exterior mirrors are
always folded out fully while driving. They
could otherwise vibrate.
i If you are driving faster than
30 mph (47 km/h ), you can no longer fold
in the exterior mirrors.
Setting the exterior mirrors If the battery has been disconnected or
completely discharged, the exterior mirrors
must be reset. The exterior mirrors will
otherwise not fold in when you select the
"Fold in
mirrors

when locking" function in the
on-board computer (Y page 199).
X Make sure that the SmartKey is in
position 1 in the ignition lock.
X Briefly press button :. Folding the exterior mirrors in or out
automatically If the "Fold in mirrors when locking" function
is activated in the on-board computer
(Y page 199):
R
the exterior mirrors

fold in automatically as
soon as you lock the vehicle from the
outside.
R the exterior mirrors fold out again
automatically as soon as you unlock the
vehicle and then open the driver's or front-
passenger door.
i If the exterior mirrors have been folded in
manually, they do not fold out.
Exterior mirror pushed out of position If an exterior mirror has been pushed out of
position, proceed as follows:
X
Vehicles without electrically folding
exterior mirrors:
move

the exterior mirror
into the correct position manually.
X Vehicles with electrically folding
exterior mirrors: press and hold mirror-
folding button ( Y page

93) until you hear a
click and then the mirrors engage in
position.
The mirror housing is engaged again and
you can adjust the exterior mirrors as usual
(Y page 92). Automatic anti-glare mirrors
The "Automatic anti-glare

mirrors" function is
only available if the vehicle is equipped with
the "Mirrors package".
The rear-view mirror and the exterior mirror
on the driver's side automatically go into anti-
glare mode if:
R the ignition is switched on and
R incident light from headlamps strikes the
sensor in the rear-view mirror.
The mirrors do not go into anti-glare mode if
reverse gear is engaged or the interior lighting
is switched on. Mirrors
93
Seats, steering wheel and mirrors Z
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Parking position for the exterior
mirror on the front-passenger side
General notes The "Parking position of the exterior mirror on
the front-passenger side" function is only
available if the vehicle is equipped with the
"Mirrors package".
Setting and
storing
the parking positionUsing reverse gear
You can position the front-passenger side
exterior mirror
in

such a way that you can see
the rear wheel on that side as soon as you
engage reverse gear. You can store this
position. X
Make sure that the vehicle is stationary and
that the SmartKey is in position 2 in the
ignition lock.
X Press button ; for the exterior mirror on
the front-passenger side.
X Engage reverse gear.
The exterior mirror on the front-passenger
side moves to the preset parking position.
X Use adjustment button = to adjust the
exterior mirror. You should see the rear
wheel and the curb in the exterior mirror.
The parking position is stored.
i If you shift the transmission to another
position, the exterior mirror on the front-
passenger side returns to the driving
position. Using the memory button
You can position the front-passenger side
exterior mirror
in

such a way that you can see
the rear wheel on that side as soon as you
engage reverse gear. You can store this
position. This setting can be stored using
memory button M ?.
X Make sure that the vehicle is stationary and
that the SmartKey is in position 2 in the
ignition lock.
X Press button ; for the exterior mirror on
the front-passenger side.
X Use adjustment button = to adjust the
exterior mirror. You should see the rear
wheel and the curb in the exterior mirror.
X Press memory button M ? and
one
of the
arrows on adjustment button = within
three seconds.
The parking position is stored if the exterior
mirror does not move.
X If the mirror moves out of position, repeat
the steps.
Calling up a stored parking position
setting X
Turn the SmartKey to position 2 in the
ignition lock.
X Adjust the exterior mirror on the front-
passenger side with the corresponding
button ( Y page 92).
X Engage reverse gear.
The exterior mirror on the front-passenger
side moves to the stored parking position.
The exterior mirror on the front-passenger
side moves back to its original position:
R as soon as you exceed a speed of 9 mph
(15 km/h)
R about ten seconds after you have
disengaged reverse gear
R if you press button : for the exterior
mirror on the driver's side 94
Mirrors
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Memory functions
Storing settings
G
WARNING
If you use the memory function on the driver's
side while driving, you could lose control of
the vehicle as a result of the adjustments
being made. There is a risk of an accident.
Only use the
memory function on the driver's
side when the vehicle is stationary. G
WARNING
When the memory function adjusts the seat,
you and other

vehicle occupants – particularly
children – could become trapped. There is a
risk of injury.
While the memory function is making
adjustments, make sure that no one has any
body parts in the sweep of the seat. If
somebody becomes trapped, immediately
release the memory function position button.
The adjustment process is stopped. G
WARNING
Children could become trapped if they
activate the memory function, particularly
when unattended. There is a risk of injury.
When leaving the vehicle, always take the
SmartKey with you

and lock the vehicle. Never
leave children unsupervised in the vehicle.
With the memory function, you can store up
to three different settings, e.g. for three
different people.
The following settings are stored as a single
memory preset:
R position of the seat, backrest and head
restraint
R driver's side: position of the exterior
mirrors on the driver's and front-passenger
sides X
Adjust the seat ( Y page 88).
X Adjust the exterior mirror on the driver's
side ( Y page 92).
X Briefly press the M memory button and
then press storage position button 1, 2 or
3 within three seconds.
The settings are stored in the selected
preset position. A tone sounds when the
settings have been completed. Calling up a stored setting
X Press and hold the relevant storage
position button 1, 2 or 3
until the

seat and
exterior mirrors are in the stored position.
i The setting procedure is interrupted as
soon as you release the storage position
button. Memory functions
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Seats, steering wheel and mirrors Z
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Useful information
i This Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific differences are
possible. Please note
that your vehicle may
not be equipped with all features
described. This also applies to safety-
related systems and functions.
i Read the information on qualified
specialist workshops: ( Y page 24).Loading guidelines
G
WARNING
If objects, luggage or loads are not secured or
not secured sufficiently, they could slip, tip
over or be

flung around and thereby hit vehicle
occupants. There is a risk of injury,
particularly in the event of sudden braking or
a sudden change in direction.
Always store objects so that they cannot be
flung around. Secure objects, luggage or
loads against slipping or tipping before the
journey. G
WARNING
Combustion engines emit poisonous exhaust
gases such as

carbon monoxide. If the tailgate
is open when the engine is running,
particularly if the vehicle is moving, exhaust
fumes could enter the passenger
compartment. There is a risk of poisoning.
Turn off the engine before opening the
tailgate. Never drive with the tailgate open.
The handling characteristics of a laden
vehicle are dependent on the distribution of
the load within the vehicle. For this reason,
you should observe the following notes when
transporting a load:
R Never exceed the maximum permissible
gross vehicle weight or the gross axle weight rating of the vehicle (including
occupants). The
values

are specified on the
vehicle identification plate on the B-pillar of
the driver's door.
R The cargo compartment is the preferred
place to carry objects.
R Position heavy loads as far forwards as
possible and as low down in the cargo
compartment as possible.
R The load must not protrude above the
upper edge of the seat backrests.
R Always place the load against the rear or
front seat backrests. Make sure that the
seat backrests are securely locked into
place.
R Always place the load behind unoccupied
seats if possible.
R Use the cargo tie down rings and the parcel
nets to transport loads and luggage.
R Use cargo tie-down rings and fastening
materials appropriate for the weight and
size of the load.
R Hook in the cargo net when loading.
R The maximum load capacity of the stowage
well under the cargo compartment floor is
55 lbs (25 kg).
R Secure the load with sufficiently strong and
wear-resistant tie-downs. pad sharp edges
for protection.
! Do not position the load on one part of the
folding cargo compartment floor only. The
maximum load capacity of the folding cargo
compartment floor is 220 lbs (100 kg).
Distribute the weight evenly to avoid
damaging the cargo compartment floor.
Place a solid board under the load if
necessary. Please note that the load on the
cargo compartment floor will be increased
when the load is lashed down. 236
Loading guidelines
Stowage and features
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Folding the rear seat backrest back
X
Move the driver's or front-passenger seat
forward if necessary.
! Make sure that the seat belt does not
become trapped when
folding the rear seat
backrest back. Otherwise, it could be
damaged.
X Swing backrest : back.
X Adjust the backrest to the desired angle by
pulling the loop ( Y page 242).
X Adjust the head restraints if necessary
(

Y page 90).
X Move the driver's or front-passenger seat
back if necessary.
Notes on using the cargo compartment Load position Making the best use of your cargo
compartment:
R
Load capacity is increased when
backrest : is set

to the load position (90°)
(Y page 242).
R Vehicles with a height-adjustable trunk
floor: a level load surface can be obtained
by moving the trunk floor to the upper
position (Y page 246).
R A larger load area can be obtained by
moving the rear bench seat as far forward
as possible ( Y page 243).
R The load area can be lengthened by folding
forward the folding backrest of the front-
passenger seat ( Y page 239) and the
corresponding backrest in the rear.
Adjusting the angle of the rear seat
backrests
You can set the angle of the seat backrests
to one of 13 detent positions. X
Pull right or left release loop ; forwards in
the direction of the arrow.
Corresponding seat backrest

: is
released.
X Pull backrest : forward
in
the direction of
the arrow, or push it back and let it engage.
X To ensure that the backrest has engaged,
lean firmly against backrest :.
i The angle and

fore/aft position of the left
and right rear seats can be separately
adjusted for each seat in order to make
better use of the cargo compartment. 242
Stowage areas
Stowage and features
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Depending on the angle of the backrest,
therefore, the right and left rear seats can
be pushed
back
varying distances until the
backrest is resting against the cargo
compartment cover.
If the backrest comes into contact with
surrounding parts of the cargo
compartment paneling, reduce the angle of
the backrest.
Adjusting the seat fore-and-aft position
! When moving the rear seats back, make
sure there are no objects in the footwell or
behind the seats. The rear seats and/or the
objects could otherwise be damaged. X
Lift the left or right release handle and slide
the corresponding seat forwards or
backwards.
X Let go of the release handle again.
Make sure that

you hear the seat engage in
position. Securing cargo
Cargo tie-down rings Observe the following notes on securing
loads:
R
Observe the loading guidelines
(Y page 236).
R Secure the load using the cargo tie-down
rings.
R Distribute the load on the cargo tie-down
rings evenly. R
Do not use
elastic straps or nets to secure
a load, as these are only intended as an
anti-slip protection for light loads.
R Do not route tie-downs across sharp edges
or corners.
R Pad sharp edges for protection.
There are four cargo tie-down rings in the
cargo compartment. :
Cargo tie-down rings
Bag hook G
WARNING
The bag hooks cannot restrain heavy objects
or items of luggage. Objects or items of
luggage could be

flung around and thereby hit
vehicle occupants when braking or abruptly
changing directions. There is a risk of injury.
Only hang light objects on the bag hooks.
Never hang hard, sharp-edged or fragile
objects on the bag hooks.
! The bag hook can bear a maximum load
of 6.6lbs (3kg) and should not be used to
secure a load.
There is one bag hook on either side of the
cargo compartment. Stowage areas
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Stowage and features Z
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R
If ABS malfunctions, the wheels can lock
during braking. This limits the steerability
of the vehicle
when braking and the braking
distance may increase. There is a risk of
accident.
R If ESP ®
malfunctions, the vehicle will not be
stabilized if it starts to skid or a wheel starts
to spin. There is a risk of accident.
You should therefore have all work involving
the battery carried out at a qualified specialist
workshop. G
WARNING
Electrostatic build-up can lead to the creation
of sparks, which could ignite the highly
explosive gases of

a battery. There is a risk of
an explosion.
Before handling the battery, touch the vehicle
body to remove any existing electrostatic
build-up.
The highly flammable gas mixture forms when
charging the battery as well as when jump-
starting.
Always make sure that neither you nor the
battery is electrostatically charged. There is
a build-up of electrostatic charge, e.g.:
R by wearing clothing made from synthetic
fibers
R due to friction between clothing and seats
R if you push or pull the battery across the
carpet or other synthetic materials
R if you wipe the battery with a cloth. G
WARNING
During the charging process, a battery
produces hydrogen gas. If a short circuit
occurs or sparks are created, the hydrogen
gas can ignite.

There is a risk of an explosion.
R Make sure that the positive terminal of a
connected battery does not come into
contact with vehicle parts.
R Never place metal objects or tools on a
battery. R
It is important that you observe the
described order of the battery terminals
when connecting and disconnecting a
battery.
R When jump-starting, make sure that the
battery poles with identical polarity are
connected.
R It is particularly important to observe the
described order when connecting and
disconnecting the jumper cables.
R Never connect or disconnect the battery
terminals while the engine is running. G
WARNING
Battery acid is caustic. There is a risk of injury.
Avoid contact with

the skin, eyes or clothing.
Do not inhale any battery gases. Do not lean
over the battery. Keep children away from
batteries. Wash battery acid immediately with
water and seek medical attention. H
Environmental note Batteries contain dangerous
substances. It is against the
law to dispose of them with
the household rubbish. They
must be
collected

separately
and recycled to protect the
environment. Dispose of batteries in an
environmentally friendly
manner. Take discharged
batteries to a qualified
specialist workshop or a
special collection point for
used batteries.
! Have the battery checked regularly at a
qualified specialist workshop.
Observe the service intervals in the
Maintenance Booklet or

contact a qualified
specialist workshop for more information.
! You should have all work involving the
battery carried out at a qualified specialist
workshop. In the exceptional case that it is 286
Battery (vehicle)
Breakdown assistance
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Follow recommended tire inflation pressures
and check the pressure of all the tires
including the spare wheel:
R
monthly, at least
R if the load changes
R before beginning a long journey
R under different operating conditions, e.g.
off-road driving
If necessary, correct the tire pressure.
Use a suitable pressure gauge to check the
tire pressure. The outer appearance of a tire
does not permit
any reliable conclusion about
the tire pressure. On vehicles equipped with
the electronic tire pressure monitor, the tire
pressure can be checked in the on-board
computer.
The recommended tire pressures for the tires
mounted at the factory can be found on the
labels described here.
1.) Tire and Loading Information placard
on the B-pillar on the driver's side of the
vehicle ( Y page 306).
The Tire and Loading Information placard
contains the recommended

tire pressures for
cold tires. The recommended tire pressures
are valid for the maximum permissible load
and up to the maximum permissible vehicle
speed. :
Recommended tire pressures
Option 2) Tire pressure table on the inside
of the fuel filler flap.
The tire pressure table contains the
recommended pressures for cold tires for various operating conditions, i.e. differing
load and speed conditions.
i
Specifications shown in the examples of
tire pressure tables are for illustration
purposes only. Tire

pressure specifications
are vehicle-specific and may deviate from
the data shown here. Tire pressure
specifications applicable to your vehicle
are located in your vehicle's tire pressure
table. Example: tire pressure table for all tires permitted
for this vehicle by the factory
If a
tire

size precedes a tire pressure, the tire
pressure information following is only valid
for that tire size. The load conditions "partially
laden" and "fully laden" are defined in the
table for different numbers of occupants and
amounts of luggage. The actual number of
seats may differ. Example: tire pressure table with tire dimensions
Some tire pressure tables show only the rim
diameters instead of the full tire size, e.g.
R18. Rim diameter

is part of the tire size and302
Tire pressure
Wheels and tires
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